It sounds like an MPV might be useful if you're after extra height but still need four or five useful seats. It's best to avoid anything imported (you'll probably see plenty of odd Toyota Estima or Lucida models about) as these can be expensive to repair. The SEAT Alhambra could be a good choice and there are plenty around to choose from at up to £2000. The 1.9 TDI is the best choice for economy, but avoid the 2.0 petrol as it's thirsty. The 1.8 T is better if you want a petrol. The SEAT Alhambra is the sister car to the Ford Galaxy and Volkswagen Sharan, but the SEAT tends to be better value for money.